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Title: Superconductivity Induced by Aging and Annealing in K{sub 1-{delta}}Cr{sub 3}As{sub 3}H{sub x}.

Abstract

There has been a puzzling discrepancy on the physical property of quasi-one-dimensional Cr-based compound KCr3As3. While the polycrystalline KCr3As3 was originally reported to be nonsuperconducting with a spin-glass ground state, the single-crystalline KCr3As3 was later found to exhibit superconductivity at similar to 5 K. Here we demonstrate that both the polycrystals and single crystals can be made either nonsuperconducting or superconducting. The pristine samples show a spin-glass behavior only, and superconductivity below 5 K is actually induced by the post-aging and/or post-annealing. The result can be understood in terms of hydrogen intercalation into the one-dimensional Cr3As3 tubes, which was discovered very recently by K. M. Taddei et al. (arXiv:1905.03360). In addition, significant K deficiency and microscopic inhomogeneity have been revealed, suggesting a phase separation scenario with columnar superconductivity in K1-delta Cr3As3Hx. The possible processes of the hydrogen intercalation are given.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Key Research and Development Program of China; Fundamental Research Funds for the Central Universities; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1577270
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 11
Country of Publication:
United States
Language:
English

Citation Formats

Xiang, Jin-Jin, Yu, Ya-Long, Wu, Si-Qi, Li, Bai-Zhuo, Shao, Ye-Ting, Tang, Zhang-Tu, Bao, Jin-Ke, and Cao, Guang-Han. Superconductivity Induced by Aging and Annealing in K{sub 1-{delta}}Cr{sub 3}As{sub 3}H{sub x}.. United States: N. p., 2019. Web. doi:10.1103/PhysRevMaterials.3.114802.
Xiang, Jin-Jin, Yu, Ya-Long, Wu, Si-Qi, Li, Bai-Zhuo, Shao, Ye-Ting, Tang, Zhang-Tu, Bao, Jin-Ke, & Cao, Guang-Han. Superconductivity Induced by Aging and Annealing in K{sub 1-{delta}}Cr{sub 3}As{sub 3}H{sub x}.. United States. doi:10.1103/PhysRevMaterials.3.114802.
Xiang, Jin-Jin, Yu, Ya-Long, Wu, Si-Qi, Li, Bai-Zhuo, Shao, Ye-Ting, Tang, Zhang-Tu, Bao, Jin-Ke, and Cao, Guang-Han. Tue . "Superconductivity Induced by Aging and Annealing in K{sub 1-{delta}}Cr{sub 3}As{sub 3}H{sub x}.". United States. doi:10.1103/PhysRevMaterials.3.114802.
@article{osti_1577270,
title = {Superconductivity Induced by Aging and Annealing in K{sub 1-{delta}}Cr{sub 3}As{sub 3}H{sub x}.},
author = {Xiang, Jin-Jin and Yu, Ya-Long and Wu, Si-Qi and Li, Bai-Zhuo and Shao, Ye-Ting and Tang, Zhang-Tu and Bao, Jin-Ke and Cao, Guang-Han},
abstractNote = {There has been a puzzling discrepancy on the physical property of quasi-one-dimensional Cr-based compound KCr3As3. While the polycrystalline KCr3As3 was originally reported to be nonsuperconducting with a spin-glass ground state, the single-crystalline KCr3As3 was later found to exhibit superconductivity at similar to 5 K. Here we demonstrate that both the polycrystals and single crystals can be made either nonsuperconducting or superconducting. The pristine samples show a spin-glass behavior only, and superconductivity below 5 K is actually induced by the post-aging and/or post-annealing. The result can be understood in terms of hydrogen intercalation into the one-dimensional Cr3As3 tubes, which was discovered very recently by K. M. Taddei et al. (arXiv:1905.03360). In addition, significant K deficiency and microscopic inhomogeneity have been revealed, suggesting a phase separation scenario with columnar superconductivity in K1-delta Cr3As3Hx. The possible processes of the hydrogen intercalation are given.},
doi = {10.1103/PhysRevMaterials.3.114802},
journal = {Physical Review Materials},
number = 11,
volume = 3,
place = {United States},
year = {2019},
month = {11}
}

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